Commit ad58d4d4 authored by James Hogan's avatar James Hogan

KVM: MIPS/T&E: Expose read-only CP0_IntCtl register

Expose the CP0_IntCtl register through the KVM register access API,
which is a required register since MIPS32r2. It is currently read-only
since the VS field isn't implemented due to lack of Config3.VInt or
Config3.VEIC.

It is implemented in trap_emul.c so that a VZ implementation can allow
writes.
Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
parent 013044cc
......@@ -2073,6 +2073,7 @@ registers, find a list below:
MIPS | KVM_REG_MIPS_CP0_ENTRYHI | 64
MIPS | KVM_REG_MIPS_CP0_COMPARE | 32
MIPS | KVM_REG_MIPS_CP0_STATUS | 32
MIPS | KVM_REG_MIPS_CP0_INTCTL | 32
MIPS | KVM_REG_MIPS_CP0_CAUSE | 32
MIPS | KVM_REG_MIPS_CP0_EPC | 64
MIPS | KVM_REG_MIPS_CP0_PRID | 32
......
......@@ -43,6 +43,7 @@
#define KVM_REG_MIPS_CP0_ENTRYHI MIPS_CP0_64(10, 0)
#define KVM_REG_MIPS_CP0_COMPARE MIPS_CP0_32(11, 0)
#define KVM_REG_MIPS_CP0_STATUS MIPS_CP0_32(12, 0)
#define KVM_REG_MIPS_CP0_INTCTL MIPS_CP0_32(12, 1)
#define KVM_REG_MIPS_CP0_CAUSE MIPS_CP0_32(13, 0)
#define KVM_REG_MIPS_CP0_EPC MIPS_CP0_64(14, 0)
#define KVM_REG_MIPS_CP0_PRID MIPS_CP0_32(15, 0)
......
......@@ -658,6 +658,7 @@ static u64 kvm_trap_emul_get_one_regs[] = {
KVM_REG_MIPS_CP0_ENTRYHI,
KVM_REG_MIPS_CP0_COMPARE,
KVM_REG_MIPS_CP0_STATUS,
KVM_REG_MIPS_CP0_INTCTL,
KVM_REG_MIPS_CP0_CAUSE,
KVM_REG_MIPS_CP0_EPC,
KVM_REG_MIPS_CP0_PRID,
......@@ -741,6 +742,9 @@ static int kvm_trap_emul_get_one_reg(struct kvm_vcpu *vcpu,
case KVM_REG_MIPS_CP0_STATUS:
*v = (long)kvm_read_c0_guest_status(cop0);
break;
case KVM_REG_MIPS_CP0_INTCTL:
*v = (long)kvm_read_c0_guest_intctl(cop0);
break;
case KVM_REG_MIPS_CP0_CAUSE:
*v = (long)kvm_read_c0_guest_cause(cop0);
break;
......@@ -855,6 +859,9 @@ static int kvm_trap_emul_set_one_reg(struct kvm_vcpu *vcpu,
case KVM_REG_MIPS_CP0_STATUS:
kvm_write_c0_guest_status(cop0, v);
break;
case KVM_REG_MIPS_CP0_INTCTL:
/* No VInt, so no VS, read-only for now */
break;
case KVM_REG_MIPS_CP0_EPC:
kvm_write_c0_guest_epc(cop0, v);
break;
......
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